patient vs unflappable

patient

adj
  • Constant in pursuit or exertion; persevering; calmly diligent. 

  • Willing to wait if necessary; not losing one's temper while waiting. 

noun
  • One who, or that which, is passively affected; a passive recipient. 

  • A person or animal who receives treatment from a doctor or other medically educated person. 

  • The noun or noun phrase that is semantically on the receiving end of a verb's action. 

unflappable

adj
  • Remaining composed and level-headed at all times; impossible to fluster; not becoming frustrated or irritated easily. 

How often have the words patient and unflappable occurred in a corpus of books? (source: Google Ngram Viewer )